CN111101129B - Integrated method for enameling and drying solar water tank - Google Patents
Integrated method for enameling and drying solar water tank Download PDFInfo
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- CN111101129B CN111101129B CN201911398549.XA CN201911398549A CN111101129B CN 111101129 B CN111101129 B CN 111101129B CN 201911398549 A CN201911398549 A CN 201911398549A CN 111101129 B CN111101129 B CN 111101129B
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- 238000004534 enameling Methods 0.000 title claims abstract description 56
- 238000001035 drying Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 150
- 238000005245 sintering Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 7
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 6
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 6
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 6
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 5
- 239000010433 feldspar Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 4
- 210000003298 dental enamel Anatomy 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000004537 pulping Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000005554 pickling Methods 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002320 enamel (paints) Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D7/00—Treating the coatings, e.g. drying before burning
Abstract
The invention discloses a method for coating and drying a solar water tank in an integral manner, and the adopted coating and drying integrated equipment comprises a coil pipe, slurry inlet and outlet pipes are arranged on two sides of the coil pipe, slurry inlet and outlet plugs are sealed, and the slurry inlet and outlet plugs are respectively connected with a tee joint and a multi-way valve and are connected with a compressed air source, a hot air circulation pipeline, a glaze slurry tank, a residual slurry tank and other components; when enameling, firstly, horizontally placing the coil pipe, starting a compressed air source, and enabling the interior of the coil pipe to reach a certain pressure value; then, the glaze slurry is driven in at a certain pressure, so that the pressure difference between the left side and the right side of the glaze slurry is kept at a stable value; when the glaze slurry occupies a certain space in the coil pipe, high-pressure compressed hot air enters the slurry inlet of the coil pipe, the glaze slurry in the coil pipe continuously flows rightwards under the pressure difference of two sides of the glaze slurry, and the high-pressure hot air dries the enameled part in the coil pipe; and after the glaze slip is completely discharged, continuously introducing compressed hot air for drying, and stopping introducing the compressed hot air. The invention improves the enameling quality, saves the using amount of the glaze slip and improves the working efficiency.
Description
Technical Field
The invention relates to the technical field of solar water tank enameling, in particular to an integral method for enameling and drying a solar water tank.
Background
With the progress of the current society, energy conservation and emission reduction become important contents of the development of the current society, and the energy conservation and emission reduction become important development directions for the reasonable and effective use of various clean energy sources such as solar energy, wind energy and the like. The vast majority of people in China have abundant solar energy resources, so that the solar water tank serving as a traditional simple solar energy utilization mode is used in a wide area in China for years. The solar water tank can convert solar energy into heat energy, so that water in the liner is heated from low temperature to high temperature, and the requirement of hot water in life and production of people is met.
In the existing solar water tank, a coil pipe is an important heat exchanger, and a circulating medium flows through the coil pipe and transfers heat to water in an inner container through heat conduction. Due to the requirement of corrosion resistance, the coil of the existing solar water tank needs to be enameled to coat the glaze slurry on the surface of the coil, and then the glaze slurry is dried, but the coil is complex in shape and easy to coat unevenly on the inner surface, and after the enameling is finished, the glaze slurry flows on the surface of the inner wall easily in the moving process of the coil because the glaze slurry is not formed yet, so that the problem that part of the local glaze slurry is thicker and part of the local glaze slurry is thinner and uneven in thickness occurs. Affecting the quality and service life of the coil.
Disclosure of Invention
In order to solve the technical problem, the invention provides an integrated method for enameling and drying a solar water tank.
The complete technical scheme of the invention comprises the following steps:
a method for integrating enameling and drying of a solar water tank comprises adopting enameling and drying equipment, wherein the enameling and drying equipment comprises a coil pipe, the coil pipe is horizontally placed, a slurry inlet pipe is arranged on the left side of the coil pipe, a slurry outlet pipe is arranged on the right side of the coil pipe, a slurry inlet plug is sealed at the front end of the slurry inlet pipe, and a slurry outlet plug is sealed at the front end of the slurry outlet pipe;
the slurry inlet plug is connected with a three-way valve, the three-way valve is respectively connected with a compressed hot air pipe and a glaze slurry pipe, the compressed hot air pipe is connected with a high-pressure hot air source, and the glaze slurry pipe is connected with a glaze slurry tank driven by a pump;
the slurry outlet plug is connected with a multi-way valve, the multi-way valve is connected with a plurality of connecting pipes, and the connecting pipes are respectively connected with a compressed air source, a hot air circulation pipeline, a residual slurry tank and other components;
the slurry outlet plug can enable the slurry outlet pipe to be sealed or communicated with the outside, and the slurry inlet plug can enable the slurry inlet pipe to be sealed or communicated with the outside;
the detachable connecting structure is arranged between the slurry inlet and outlet plug and the slurry inlet and outlet pipe; the slurry inlet and outlet plug and the corresponding valve are also in detachable connection structures;
when in enameling, firstly, the coil pipe is horizontally placed, slurry inlet and outlet plugs are respectively sleeved on the slurry inlet and outlet pipe sleeves, the slurry inlet plug is connected with a three-way valve, the slurry outlet plug is connected with a multi-way valve, and then the slurry inlet and outlet plugs are all in a communicated state; then, starting a compressed air source to enable the compressed air to enter the coil pipe through a connecting pipe connected with the compressed air source and the multi-way valve, and enabling the inside of the coil pipe to reach a pressure value of 0.2 MPa; then, the three-way valve is adjusted to the glaze slurry pipe to be communicated with the slurry inlet pipe, the pressure pump is started, glaze slurry is pumped in at the pressure of 0.5MPa, the pressure difference between the left side and the right side of the glaze slurry is stabilized at 0.3MPa, the glaze slurry is injected from the slurry inlet pipe on the left side of the coil pipe and flows towards the right side along the inside of the coil pipe under the action of the pressure difference, and in the process, because the two sides of the glaze slurry are subjected to the stable pressure, the glaze slurry flows in the coil pipe in a stable mode, and the glaze slurry is in stable and uniform contact with the inner wall of the;
when the glaze slurry approximately occupies 1/3 space inside the coil, the three-way valve is switched to enable high-pressure compressed hot air to enter the slurry inlet of the coil, the air supply pressure of the compressed hot air is 0.5MPa, and the glaze slurry in the coil continuously flows rightwards under the pressure difference between the left high-pressure hot air and the right compressed air; the high-pressure hot air dries the enameled part in the coil pipe;
after the glaze slurry reaches the slurry outlet pipe plug, the glaze slurry is discharged from the multi-way valve and is guided to the residual slurry tank through a connecting pipe, and the compressed hot air on the left side continuously dries the inner wall of the coil pipe; after the glaze slurry is completely discharged, continuously introducing compressed hot air, and introducing the hot air discharged from the multi-way valve into a hot air circulating system through a connecting pipe;
and after continuously drying for 8-10 min, stopping introducing the compressed hot air, then closing the slurry inlet and outlet plug, and enameling and drying the outer surface of the coil pipe in a conventional manner to finish the enameling and drying of the outer surface of the coil pipe.
And after drying, sintering the coil pipe at 600-1200 ℃ to finish the sintering of the coil pipe.
Compared with the prior art, the invention has the obvious effects that: the problem of prior art coil pipe internal surface easy coating inhomogeneous, and after the enameling, the glaze slip takes place to flow easily on the inner wall surface, leads to appearing the thickness inhomogeneous. The glaze slip is poured in a two-side pressurization mode, so that the glaze slip stably flows in the coil pipe under constant pressure difference of two sides, the enameling quality is improved, the pressure difference of two sides can be adjusted and changed to adapt to enameling production under different conditions, the required glaze slip is less, the using amount of the glaze slip is saved, the enamel process is simultaneously used for drying the glaze slip coated in the coil pipe by hot air, the glaze slip forming can be realized on the premise of not moving the coil pipe, and the enameling quality and the working efficiency are improved.
Drawings
FIG. 1 is a schematic structural view of a coil pipe enamel coating and drying integrated device.
FIG. 2 is a flow chart of the integrated coil pipe enameling and drying method of the invention.
In the figure: the device comprises a coil pipe 1, a slurry inlet pipe 2, a slurry outlet pipe 3, a slurry inlet plug 4, a slurry outlet plug 5, a three-way valve 6, a multi-way valve 7, a compressed hot air pipe 8, a glaze slurry pipe 9 and a connecting pipe 10.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only illustrative and are not intended to limit the present application.
As shown in figure 1, the enamel coating and drying integrated equipment for the coil pipe comprises: coil pipe 1, the coil pipe is placed for the level, and the coil pipe left side is equipped with into thick liquid pipe 2, and the right side is equipped with out thick liquid pipe 3, goes into thick liquid pipe front end and seals into thick liquid end cap 4, goes out thick liquid pipe front end and seals out thick liquid end cap 5. The slurry inlet plug 4 is connected with a three-way valve 6, the three-way valve 6 is respectively connected with a compressed hot air pipe 8 and a glaze slurry pipe 9, the compressed hot air pipe 8 is connected with a high-pressure hot air source, and the glaze slurry pipe 9 is connected with a glaze slurry tank driven by a pump. The slurry outlet plug 5 is connected with a multi-way valve 7, the multi-way valve 7 is connected with a plurality of connecting pipes 10 (only one is schematically shown in the figure), and the plurality of connecting pipes are respectively connected with a compressed air source, a hot air circulation pipeline, a residual slurry tank and the like.
The slurry outlet plug can seal or communicate the slurry outlet pipe with the outside, the slurry inlet plug can seal or communicate the slurry inlet pipe with the outside, and the slurry outlet plug can be realized by arranging a simple hand-operated valve at the pipeline opening.
And the pulp inlet and outlet plug and the pulp inlet and outlet pipe are detachable. The slurry inlet and outlet plug and the corresponding valve are also detachable.
When in enameling, the coil pipe is horizontally placed, the slurry inlet and outlet plugs are respectively sleeved on the slurry inlet and outlet pipe sleeves, the slurry inlet plug is connected with a three-way valve, the slurry outlet plug is connected with a multi-way valve, and then the slurry inlet and outlet plugs are all in a communicated state. Firstly, a compressed air source is started, compressed air enters the coil pipe through a connecting pipe connected with the compressed air source and the multi-way valve, and the pressure value inside the coil pipe reaches 0.2 MPa. Then, the three-way valve is adjusted to the glaze slurry pipe to be communicated with the slurry inlet pipe, the pressure pump is started, the glaze slurry is pumped in at the pressure of 0.5MPa, the pressure difference between the left side and the right side of the glaze slurry is stabilized at 0.3MPa, the glaze slurry is injected from the slurry inlet pipe on the left side of the coil pipe and flows towards the right side along the inside of the coil pipe under the action of the pressure difference, and in the process, as the two sides of the glaze slurry are both subjected to stable pressure, the glaze slurry flows in the coil pipe in a stable mode, and the glaze slurry and the inner wall of the coil pipe are kept in stable and uniform contact, as.
When the glaze slurry occupies approximately the space in the coil interior 1/3, the three-way valve is switched to allow high-pressure hot compressed air to enter the coil inlet, as shown in fig. 2 b. The air supply pressure of the compressed hot air is 0.5MPa, and the glaze slurry in the coil pipe continuously flows rightwards under the pressure difference between the high-pressure hot air on the left side and the compressed air on the right side. The high-pressure hot air dries the enameled part.
After the glaze slurry reaches the slurry outlet pipe plug, the glaze slurry is discharged from the multi-way valve and is guided to the residual slurry tank through a connecting pipe, and the compressed hot air on the left side continues to dry the inner wall of the coil pipe, as shown in fig. 2 c. And after the glaze slurry is completely discharged, continuously introducing compressed hot air, and introducing the hot air discharged from the multi-way valve into a hot air circulating system through a connecting pipe. As shown in fig. 2 d.
And after continuously drying for 8-10 min, basically molding the glaze slip on the inner wall of the coil. Stopping introducing the compressed hot air, then closing the slurry inlet and outlet plug and closing the coil pipe, and enameling and drying the outer surface of the coil pipe in a conventional manner to finish the enameling and drying of the outer surface of the coil pipe.
And sintering the coil pipe at 600-1200 ℃ to finish the sintering of the coil pipe.
In addition, before the inner wall is enameled, the inner wall can be subjected to impurity and oxide layer removal by adopting the manners of acid washing, flushing, gas purging and the like, which is the conventional technology and is not described again.
In the coil pipe enameling process, the problem that the inner surface of the coil pipe is easy to be coated unevenly is considered, and meanwhile, after enameling is finished, the glaze slip is easy to flow on the surface of the inner wall because the glaze slip is not formed yet in the moving process of the coil pipe, so that part of the glaze slip is thicker, and part of the glaze slip is thinner, so that the thickness is uneven. Therefore, in the process of enameling the inner wall, firstly, the glaze slip is poured in a two-side pressurization mode, so that the glaze slip stably flows in the coil pipe under constant pressure difference of two sides and can be fully contacted with the inner wall of the coil pipe, and in addition, the pressure difference of two sides can be changed in the process, so that the flowing speed of the glaze slip is changed, and the enameling production under different conditions is adapted. When the glaze slurry occupies one third of the space in the coil pipe, high-pressure compressed hot air is used for pushing the glaze slurry to continuously flow. The use amount of the glaze slip is saved, and the glaze slip coated in the coil pipe can be dried by utilizing hot air. After all the glaze slip is discharged, the drying is continued for a certain time, and the glaze slip forming can be realized on the premise of not moving the coil pipe. After the inner wall glaze slurry is formed, the slurry inlet and outlet plug can be closed, and the outer surface of the coil pipe is enameled and dried in a conventional mode to finish the enameling of the inner and outer surfaces of the whole coil pipe; the plug can then be removed and sintered.
In addition, the present invention includes preferred embodiments including:
(2) enameling the inner container: enameling and sintering the inner container in a conventional mode or other modes;
(3) assembling, welding and assembling: and assembling and welding the coil pipe and the inner container which are qualified after the inspection.
Before the inner wall of the coil pipe is enameled, sundries and an oxide layer on the inner wall can be removed by adopting the modes of acid washing, flushing, gas purging and the like.
The enameling glaze slurry and the method for enameling an inner container used in the present invention further include preferred embodiments including:
(1) preparing glaze slip:
the glaze slip adopted by the invention at least comprises the following raw materials: SiO 22: 52-58 parts by mass of feldspar powder: 48-50 parts by mass of boric anhydride: 18-25 parts by mass of alumina: 4-6 parts by mass, the sum of cobalt oxide and nickel oxide: 1.2-1.6 parts by mass of soda: 4-6 parts by mass of calcium carbonate: 1-3 parts by mass of kaolin: 2 to 3 parts by mass.
In the components of the glaze slip, silicon oxide and feldspar powder are used as base materials, boric anhydride and alkalis are added to serve as functional components for reducing the melting point of the base materials, and the thermal expansion coefficient of the soda ash is adjusted at the same time. As for the amount of cobalt oxide and nickel oxide, in the actual production, the addition of feldspar powder into cobalt oxide and nickel oxide can make the glaze more fusible, improve the viscosity, reduce the surface tension gradually and make the glaze more easily coated on the surface of a steel plate. After the product is detected, the addition of the cobalt oxide and the nickel oxide can form a partial microcrystalline phase after sintering, and the compressive strength is also obviously improved. Through multiple experiments on the dosage of the base component and each functional component, and comprehensive comparison of the influence on performance and cost consideration, the optimal dosage combination is finally selected, namely, the glaze component of the invention meets the following relationship, (silicon oxide + feldspar powder), (boric anhydride + soda), and (cobalt oxide + nickel oxide) ═ 100: (24 to 28) (1.4 to 1.6)
And uniformly mixing the prepared raw materials by using a ball-milling mixer, and adding deionized water to obtain the glaze slip used by the invention.
(2) Inner container enameling process
The inner container of the enamel water tank is enameled, preferably on an inner container enameling machine, wherein an initial position stroke limit switch is arranged at the initial position of the inner container enameling machine, and a guniting position stroke limit switch is arranged at the guniting position; the initial position travel limit switch and the guniting position respectively collect swing bracket limit position signals, and the swinging of the swing bracket, the pause of any angle position, the rotation of the workpiece, and the pressing and loosening of the workpiece are controlled by a control system; the control system comprises a manual control mode and an automatic control mode;
the method comprises the following specific steps:
(1) in a manual control mode, the pressing cylinder is lifted, and the liner is installed in place; then the compressing cylinder descends to compress the inner container, and the inner container is at an initial position and the axis of the inner container is vertical;
(2) in an automatic control mode, the main cylinder drives the swing frame to turn forwards until the swing frame touches a guniting position travel limit switch, and at the moment, the included angle between the axis of the liner and the horizontal plane is 45-55 degrees;
(3) the auxiliary motor is started to drive the inner container to rotate at a constant speed of 10-15rpm, and before the enameling operation is finished, the inner container always rotates at a constant speed;
(4) after the rotation is timed for 30 seconds, the diaphragm pump is started, the glaze slurry is driven into the inner container, the pulping time is 10 seconds, and a compressed air source is started to pressurize the inner container;
(5) the main cylinder drives the swing frame to turn backwards, the turning time is 5 seconds, and the swing frame is stopped until the inner container keeps a horizontal position;
(6) stopping overturning, after the inner container continues to rotate and is timed for 20 seconds, driving the swing frame to overturn backwards again by the main cylinder, wherein the overturning time is 5 seconds, and the swing frame stops overturning, and at the moment, the included angle between the axis of the inner container and the horizontal plane is 25-35 degrees;
(7) stopping overturning, after the inner container continues to rotate and time for 20 seconds, driving the swing frame to continue to overturn backwards by the main cylinder, wherein the overturning time is 5 seconds, and the swing frame stops overturning, and at the moment, the included angle between the axis of the inner container and the horizontal plane is 60-75 degrees;
(8) stopping overturning, after the inner container continues to rotate and is timed for 20 seconds, driving the swing frame to overturn forwards by the main cylinder, wherein the overturning time is 5 seconds, and the swing frame stops overturning, and the included angle between the axis of the inner container and the horizontal plane is 10-15 degrees;
(9) stopping overturning, after the inner container continues to rotate and is timed for 20 seconds, driving the swing frame to overturn backwards by the main cylinder until the swing frame touches the stroke limit switch at the initial position, and at the moment, the inner container is at the initial position and the axis of the inner container is vertical;
(10) the auxiliary motor is turned off after the inner container continues to rotate for 10 seconds, and the inner container stops rotating;
(11) and under a manual control mode, the pressing air cylinder is lifted, the liner is taken down from the liner enameling machine and hung on a drying conveying line.
According to the enameling method, except for the initial position and the guniting position, the limit position signal is required to be acquired, the external signal is not required to be acquired when other actions are finished, and the omnibearing enameling inside the workpiece is realized by setting the time length of each action. The control system controls the workpiece to swing and pause at a preset angle relative to the control system for acquiring external signals, and avoids system control abnormity caused by external signal faults. The coating process is controlled by time in a mode of combining manual control and automatic control, and 360-degree coating without dead angles can be achieved.
The above applications are only some embodiments of the present application. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept herein, and it is intended to cover all such modifications and variations as fall within the scope of the invention.
Claims (2)
1. An integrated enameling and drying, inner container enameling and assembly welding assembly method of a solar water tank coil pipe is characterized in that,
the method comprises the steps of integral enameling and drying of the coil pipe of the solar water tank, sintering of the coil pipe, enameling of an inner container and assembly welding and assembly; the method comprises the following specific steps:
(1) the integral enameling and drying of the solar water tank coil adopts enameling and drying integrated equipment, the enameling and drying integrated equipment comprises a coil, the coil is horizontally placed, a slurry inlet pipe is arranged on the left side of the coil, a slurry outlet pipe is arranged on the right side of the coil, a slurry inlet plug is sealed at the front end of the slurry inlet pipe, and a slurry outlet plug is sealed at the front end of the slurry outlet pipe;
the slurry inlet plug is connected with a three-way valve, the three-way valve is respectively connected with a compressed hot air pipe and a glaze slurry pipe, the compressed hot air pipe is connected with a high-pressure hot air source, and the glaze slurry pipe is connected with a glaze slurry tank driven by a pump;
the slurry outlet plug is connected with a multi-way valve, the multi-way valve is connected with a plurality of connecting pipes, and the plurality of connecting pipes are respectively connected with a compressed air source, a hot air circulation pipeline and a residual slurry tank;
the slurry outlet plug can enable the slurry outlet pipe to be sealed or communicated with the outside, and the slurry inlet plug can enable the slurry inlet pipe to be sealed or communicated with the outside;
the slurry outlet and inlet plugs and the slurry outlet and inlet pipes are of detachable connection structures; the slurry outlet plug and the slurry inlet plug and the corresponding valves are also of detachable connection structures;
when in enameling, firstly, the coil pipe is horizontally placed, slurry inlet and outlet plugs are respectively sleeved on the slurry inlet and outlet pipe sleeves, the slurry inlet plug is connected with a three-way valve, the slurry outlet plug is connected with a multi-way valve, and then the slurry inlet and outlet plugs are all in a communicated state; then, starting a compressed air source to enable the compressed air to enter the coil pipe through a connecting pipe connected with the compressed air source and the multi-way valve, and enabling the inside of the coil pipe to reach a pressure value of 0.2 MPa; then, the three-way valve is adjusted to the glaze slurry pipe to be communicated with the slurry inlet pipe, the pressure pump is started, glaze slurry is pumped in at the pressure of 0.5MPa, the pressure difference between the left side and the right side of the glaze slurry is stabilized at 0.3MPa, the glaze slurry is injected from the slurry inlet pipe on the left side of the coil pipe and flows towards the right side along the inside of the coil pipe under the action of the pressure difference, and in the process, because the two sides of the glaze slurry are subjected to the stable pressure, the glaze slurry flows in the coil pipe in a stable mode, and the glaze slurry is in stable and uniform contact with the inner wall of the;
when the glaze slurry approximately occupies 1/3 space inside the coil, the three-way valve is switched to enable high-pressure compressed hot air to enter the slurry inlet of the coil, the air supply pressure of the compressed hot air is 0.5MPa, and the glaze slurry in the coil continuously flows rightwards under the pressure difference between the left high-pressure hot air and the right compressed air; the high-pressure hot air dries the enameled part in the coil pipe;
after the glaze slurry reaches the slurry outlet pipe plug, the glaze slurry is discharged from the multi-way valve and is guided to the residual slurry tank through a connecting pipe, and the compressed hot air on the left side continuously dries the inner wall of the coil pipe; after the glaze slurry is completely discharged, continuously introducing compressed hot air, and introducing the hot air discharged from the multi-way valve into a hot air circulating system through a connecting pipe;
after continuously drying for 8-10 min, stopping introducing the compressed hot air, then closing the slurry inlet and outlet plug, and enameling and drying the outer surface of the coil pipe in a conventional manner to finish the enameling and drying of the outer surface of the coil pipe;
(2) sintering the coil pipe at 600-1200 ℃ to complete the sintering of the coil pipe;
(3) enameling the inner container: enameling and sintering the inner container; the method specifically comprises the following steps:
the inner container is enameled by using an enameling machine, an initial position and a stroke limit switch are arranged at the initial position of the enameling machine, and a slurry spraying position and a stroke limit switch are arranged at the slurry spraying position; the initial position travel limit switch and the guniting position travel limit switch respectively collect limit position signals of the swing bracket, and the swing of the swing bracket, the pause of any angle position, the rotation of the workpiece, and the compression and the release of the workpiece are controlled by a control system; the control system comprises a manual control mode and an automatic control mode;
the glaze slip at least comprises the following raw material components: silicon dioxide: 52-58 parts by mass of feldspar powder: 48-50 parts by mass of boric anhydride: 18-25 parts by mass of alumina: 4-6 parts by mass, the sum of cobalt oxide and nickel oxide: 1.2-1.6 parts by mass of soda: 4-6 parts by mass of calcium carbonate: 1-3 parts by mass of kaolin: 2-3 parts by mass;
the concrete steps of utilizing the control system to enamel the inner container comprise:
1) in a manual control mode, the pressing cylinder is lifted, and the liner is installed in place; then the compressing cylinder descends to compress the inner container, and the inner container is at an initial position and the axis of the inner container is vertical;
2) under the automatic control mode, the main cylinder drives the swing bracket to turn forwards until the swing bracket touches a guniting position travel limit switch, and the included angle between the axis of the liner and the horizontal plane is 45-55 degrees;
3) the auxiliary motor is started to drive the inner container to rotate at a constant speed of 10-15rpm, and before the enameling operation is finished, the inner container always rotates at a constant speed;
4) after the rotation is timed for 30 seconds, the diaphragm pump is started, the glaze slurry is driven into the inner container, the pulping time is 10 seconds, and a compressed air source is started to pressurize the inner container;
5) the main cylinder drives the swing bracket to turn backwards, the turning time is 5 seconds, and the swing bracket stops until the inner container keeps a horizontal position;
6) stopping overturning, after the inner container continues to rotate and is timed for 20 seconds, driving the swing bracket to overturn backwards again by the main cylinder, wherein the overturning time is 5 seconds, stopping overturning by the swing bracket, and forming an included angle of 25-35 degrees between the axis of the inner container and the horizontal plane;
7) stopping overturning, after the inner container continues to rotate and count time for 20 seconds, driving the swing bracket to continue overturning backwards by the main cylinder, wherein the overturning time is 5 seconds, and the swing bracket stops overturning, and at the moment, the included angle between the axis of the inner container and the horizontal plane is 60-75 degrees;
8) stopping overturning, after the inner container continues to rotate and is timed for 20 seconds, driving the swing support to overturn forwards by the main cylinder, wherein the overturning time is 5 seconds, stopping overturning by the swing support, and at the moment, the included angle between the axis of the inner container and the horizontal plane is 10-15 degrees;
9) stopping overturning, after the inner container continues to rotate and is timed for 20 seconds, driving the swinging bracket to overturn backwards by the main cylinder until the swinging bracket touches an initial position travel limit switch, and at the moment, the inner container is in an initial position and the axis of the inner container is vertical;
10) the auxiliary motor is turned off after the inner container continues to rotate for 10 seconds, and the inner container stops rotating;
11) under a manual control mode, the pressing air cylinder is lifted, the inner container is taken down from the enameling machine and hung on a drying conveying line;
(4) assembling, welding and assembling: and assembling and welding the coil pipe and the inner container which are qualified after the inspection.
2. The integrated enameling and drying, inner container enameling and assembly welding assembly method for the solar water tank coil according to claim 1 is characterized in that impurities and an oxide layer are removed from the inner wall of the coil in a pickling, flushing and gas purging mode before the inner wall of the coil is enamelled.
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| CN101444782A (en) * | 2008-12-26 | 2009-06-03 | 中冶建工有限公司 | Method for cleaning or corrosion-protective coating inner wall of industrial pipeline and device |
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| CN104962915A (en) * | 2015-05-29 | 2015-10-07 | 江苏迈能高科技有限公司 | Heat exchanger coil pipe glaze covering process method and special equipment |
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| SU836212A1 (en) * | 1977-10-18 | 1981-06-07 | Специальное Конструкторское Бюрогазовой Хроматографии | Method of glass enamel coating of inner surface of tubes |
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| CN101444782A (en) * | 2008-12-26 | 2009-06-03 | 中冶建工有限公司 | Method for cleaning or corrosion-protective coating inner wall of industrial pipeline and device |
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Denomination of invention: An integrated method for coating, lining and drying solar water tank Effective date of registration: 20220331 Granted publication date: 20200904 Pledgee: Heze rural commercial bank Limited by Share Ltd. Pledgor: Shandong Haohua enamel water tank Co.,Ltd. Registration number: Y2022980003619 |
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Date of cancellation: 20231207 Granted publication date: 20200904 Pledgee: Heze rural commercial bank Limited by Share Ltd. Pledgor: Shandong Haohua enamel water tank Co.,Ltd. Registration number: Y2022980003619 |
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Effective date of registration: 20240116 Address after: 528427, Building B, 7th Floor, Fengtian Zhizao Park, Yuegui East Road, Nantou Town, Zhongshan City, Guangdong Province Patentee after: Gelman (Guangdong) New Energy Technology Co.,Ltd. Address before: 274000 200 meters east of 220 National Road, Dusi Town, Mudan District, Heze City, Shandong Province Patentee before: Shandong Haohua enamel water tank Co.,Ltd. |
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